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package rings
import (
"fmt"
"net/netip"
"testing"
)
func TestAddrFrom4(t *testing.T) {
cases := []struct {
v [4]uint
s string
}{
{[4]uint{0, 0, 0, 0}, "0.0.0.0"},
{[4]uint{127, 0, 0, 1}, "127.0.0.1"},
{[4]uint{4096 + 127, 0, 0, 1}, "127.0.0.1"},
{[4]uint{257, 258, 259, 260}, "1.2.3.4"},
{[4]uint{255, 255, 255, 255}, "255.255.255.255"},
}
for i, tc := range cases {
fn := fmt.Sprintf("%v.%v.%v.%v", tc.v[0], tc.v[1], tc.v[2], tc.v[3])
addr := AddrFrom4(tc.v[0], tc.v[1], tc.v[2], tc.v[3])
s := addr.String()
if s == tc.s {
t.Logf("[%v/%v]: %s → %s", i, len(cases), fn, s)
} else {
t.Errorf("ERROR: [%v/%v]: %s → %s (expected %s)", i, len(cases), fn, s, tc.s)
}
}
}
func TestAddrU32Invalid(t *testing.T) {
cases := []netip.Addr{
{},
netip.IPv6Unspecified(),
netip.IPv6Loopback(),
}
for i, tc := range cases {
v, ok := AddrToU32(tc)
switch {
case !ok && v == 0:
t.Logf("[%v/%v]: %s → %v %v", i, len(cases), tc, 0, false)
default:
t.Errorf("ERROR: [%v/%v]: %s → %v %v (expected %v %v)", i, len(cases),
tc, v, ok, 0, false)
}
}
}
func TestAddrU32Valid(t *testing.T) {
cases := []netip.Addr{
netip.IPv4Unspecified(),
AddrFrom4(0, 0, 0, 0),
AddrFrom4(1, 2, 3, 4),
AddrFrom4(10, 20, 30, 40),
AddrFrom4(127, 0, 0, 1),
AddrFrom4(255, 255, 255, 255),
MustParseAddr("::ffff:1.2.3.4"),
}
for i, tc := range cases {
u32, ok := AddrToU32(tc)
if !ok {
t.Errorf("ERROR: [%v/%v]: %s → %v %v", i, len(cases), tc, u32, ok)
continue
}
addr := AddrFromU32(u32)
if tc.Is4In6() {
ok = addr.Compare(tc.Unmap()) == 0
} else {
ok = addr.Compare(tc) == 0
}
if ok {
t.Logf("[%v/%v]: %s → %v → %s", i, len(cases), tc, u32, addr)
} else {
t.Errorf("ERROR: [%v/%v]: %s → %v → %s", i, len(cases), tc, u32, addr)
}
}
}
func MustParseAddr(s string) netip.Addr {
addr, err := netip.ParseAddr(s)
if err != nil {
panic(err)
}
return addr
}